Found a pea sized amount of dark brown blood.

Hi,
Welcome to ehealthforum,
If it was not associated with abdominal cramps, backpain, and if bleeding/spotting is not getting heavier then you can relax. Avoid having intercourse during first trimester. If you have symptoms like increased abdominal cramps, increasing backpain, increase in bleeding, fresh bleeding etc, then do not ignore your symptoms and visit your gynecologist/obstetrician for further evaluation to rule out chances of miscarriage. If detected early, appropriate steps can be taken to prevent miscarriage.
Take care.